% 计算列车单位运行基本阻力；input1:[a b c] 三个参数; input2: v_kmh 速度 km/h
function unit_basicforce = cal_unit_basicResist(abc_params, v_kmh)
if length(abc_params) == 3
    unit_basicforce = abc_params(1) + abc_params(2)*v_kmh + abc_params(3)*v_kmh*v_kmh;
else
    fprintf("abc参数输入有问题\n");
    unit_basicforce = 0;
end
